标题:Measurement of J/ψ → Ξ (1530)-Ξ + and evidence for the radiative decay Ξ (1530)-→γ Ξ-MEASUREMENT of ... M. ABLIKIM et al.
作者:Ablikim M.; Achasov M.N.; Adlarson P.; Ahmed S.; Albrecht M.; Alekseev M.; Amoroso A.; An F.F.;等 更多
作者机构:[Ablikim, M] Institute of High Energy Physics, Beijing, 100049, China;[ Achasov, M.N] G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibi 更多
通讯作者地址:[Ablikim, M] Institute of High Energy PhysicsChina
来源:Physical Review D
出版年:2020
卷:101
期:1
DOI:10.1103/PhysRevD.101.012004
摘要:The SU(3)-flavor violating decay J/ψ→Ξ(1530)-Ξ++c.c. is studied using (1310.6±7.0)×106 J/ψ events collected with the BESIII detector at BEPCII, and the branching fraction is measured to be B(J/ψ→Ξ(1530)-Ξ++c.c.)=(3.17±0.02stat±0.08syst)×10-4. This result is consistent with previous measurements with an order of magnitude improved precision. The angular parameter for this decay is measured for the first time and is found to be α=-0.21±0.04stat±0.06syst. In addition, we report evidence for the radiative decay Ξ(1530)-→γΞ-with a significance of 3.9σ, including the systematic uncertainties. The 90% confidence level upper limit on the branching fraction is determined to be B(Ξ(1530)-→γΞ-)≤3.7%. © 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/" Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
收录类别:SCOPUS
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85078108503&doi=10.1103%2fPhysRevD.101.012004&partnerID=40&md5=2eef253ac85c7b362bf187cf593853ac
TOP